Z89175 Datasheet, PDF (1/68 Pages) Zilog, Inc. – Voice Processing Controllers

PRELIMINARY PRODUCT SPECIFICATION
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Z89175
1
Z89176 (ROMLESS)
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VOICE PROCESSING CONTROLLERS
FEATURES
Device
ROM
(KB)
RAM*
(Bytes)
Z89175
24
256
Z89176
-
256
Note: *General-Purpose
I/O
Lines
47
31
Voltage
Range
4.5V to 5.5V
4.5V to 5.5V
s Watch-Dog Timer and Power-On Reset
s Improved Low Power Stop Mode
s On-Chip Oscillator which Accepts a Crystal
or External Clock Drive
s Improved Global Power-Down Mode
s Low Power Consumption - 200 mW (typical)
s Two Comparators
s RAM and ROM Protect
s On-Board Oscillator for 32.768 kHz Real-Time Clock
s Clock Speeds of 20.48 or 29.49 MHz
s 16-Bit Digital Signal Processor (DSP)
s 8K Word DSP Program ROM
s 512 Words On-Chip DSP RAM
s 8-Bit A/D Converter with up to 16 kHz Sample Rate
s 10-Bit PWM D/A Converter
s Six Vectored, Prioritized Z8 Interrupts
s Three Vectored, Prioritized DSP Interrupts
s Two DSP Timers to Support Different A/D and D/A
Sampling Rates
s IBM^® PC-Based Development Tools
s Developer’s Toolbox for T.A.M. Applications
GENERAL DESCRIPTION
The Z89175/176 is a fully integrated, dual processor con-
troller designed for voice processing applications. The I/O
control processor is a Z8^® with 24 KB of program memory,
two 8-bit counter/timers, and up to 47 I/O pins. The DSP is
a 16-bit processor with a 24-bit ALU and accumulator,
512x16 bits of RAM, single cycle instructions, and 8K
words of program ROM. The chip also contains a half-flash
8-bit A/D converter with up to a 16 kHz sample rate and a
10-bit PWM D/A converter. The sampling rates for the con-
verters are programmable. The precision of the 8-bit A/D
can be extended by resampling the data at a lower rate in
software. The Z8 and DSP processors are coupled by
mailbox registers and an interrupt system. DSP or Z8 pro-
grams can be directed by events in each other’s domain.
The Z89176 is the ROMless version of the Z89175. How-
ever, the on-chip DSP is not ROMless.
Notes: All Signals with a preceding front slash, "/", are ac-
tive Low, e.g., B//W (WORD is active Low); /B/W (BYTE is
active Low, only).
Power connections follow conventional descriptions be-
low:
Connection
Power
Ground
Circuit
V_CC
GND
Device
V_DD
V_SS
DS97TAD0100
PRELIMINARY
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